Clamp



ycurely grip the article, associated therewith. j

DAVID w. V:sown or DETROIT, iviIcHic-Aiv.

CLAMP. Y

to provide a hoisting hook which will po-V sition itself on the rail under operation, and one which will be automatically locked in such position to insure against the release of the hook. Y

lA further obj ect of the invention is to provide a device of this character wherein the weight of the article being lifted will cause the jaws to move toward eachv other to se- With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement ofparts and in theJ details of construction hereinafter dej scribed and claimed, it being understood on line 3-3 of Fig. 2.

Referring to the drawing Vin detail, the device forming the subject matter of this invention includes opposed jaw sections 5 and 6 respectively, the jaw section 5 being provided with the flanges 7 adapted to einbrace the flanges 8 of the opposed jaw section 6. j

The jaw sections, and more particularly the flanges thereof are provided with openings indicated at 9, which openings, when the jaws are in assembled relation register to accommodate theL bolt 10 providing the pivot for the jaws, toL permit the jaws to I l.Specification of LettersA Patent. Patented Allg'. 16,1921?. Application filed June 3,

1920. Serial No. 386,374.

rock withV relation to each other, to accomplish the gripping result. s

Formed in each of the jaw sections is a cut. out portion indicated at 11, the ends thereof being curved as at 12 to provide camming surfaces, for purposes to be hereinafter more fully y described.

The supporting member, forming a part s of the clamp comprises the head 18 provided with an elongated opening 14 extending longitudinally of the head, to permit ofmovement ofl the supporting :memberwith relation to the jaw sections, the movement of the supporting memberbeing limited by the length of the cut out portion 1l.k

Curved surfaces 15 are formed on the head 13, while at the opposite end thereof, the curved surfaces 16 are provided, ythe curved surfaces 15 coperating with the curved surfaces formed at the upper ends of the jawsections for rocking the jaw sections to move the clamping ends thereof toward each other, that is when the device is lifting, and the supporting member is moving in one direction. Vhen the supporting member is` moved in the opposite direction, the curved portions 16 ofthe head 13, contact with. the curved surfaces 12, disposed adjacent to the lower ends of the jaw sections, to cause the jaw sections to move away from each other, or moved tol an open position.

Y LIn order that the jaw sections will be automatically locked in their open positions, the spring latch member indicated at 17 is provided, one end of which is secured to one of the sections as by means of the screws 18, the opposite endthereof extending at right angles to position itself in the Aopening 19,y

formed 'in the opposed jaw section, so that Vthejaws may be permitted to move toa closed position, onlyafter 'the latch member has been moved to release the jaw sections. .Having thus described the invention, what is claimed as new is In a hoistinghook, a supporting member having'a head, formed at one end thereof,

said head having an elongatedk openingk formed therein, opposed jaw sections having Vpivotal connection with the head, said jaw sections having openings registering` with the elongated opening in the head, a.

bolt passing through the opening, for securing the jaw sections to the supporting member, said jaw sections having curved sur- In testimony that I claim the foregoing as faces, said head having curved surfaces, the my own, l' have hereto affixed my signature l0 ourvedhsurfaoes dadapteld to, coperate to in the preSence of two Witnesses.

move t e free en s of t e jaw sections with n relation to each othe1,-When the `head is y A l 'DAVID W BOVE' moved Within the Vjavv sections, and means Witnesses:

for locking the jaw sections in an open 'poff LEOTTA L. STEVENS',

ston.v MARGARET M. STEVENS. 

